Zhak's Reaper

Whenever a creature dies, mill a card.
Fathomless descent—Zhak's Reaper's power and toughness are each equal to the number of
permanent cards in your graveyard.
The unearthly beast haunts the graves and homes of
our good citizens. Frankly, I believe we should just kill
it. What'd you say? The Lord would kill us? Don't
matter if this thing would anyway. Grab a pitchfork.